Extracting-tool



H. P. KRAFT.

Exrmme TooL. APPLICATION FQILED IAR. I |9116.

1,389,667. Patentedsept. 6,1921.

WITNESSES:

H. P. KRAFT.

EXTRACTING TOOL.

APPLICATION FILED MAR. I, 191e.

Patented sept. 6,1921.

WITNESSES;

UNl'lED STATES PATENT OFFICE. Y'

. HENRYRKRAIT, or Rinenwoon, NEW JERSEY.'

EXTRACTINe-Toon Specification of Letters Patent.

Patent-ed sept. 6,1921.

.Application lfiled March 1, 1916. Serial No.81',342.

To @ZZ 'whomz't may concern Be it knownthat I, HENRY P. KRAFT, a citizen of the United States of America, residing in Ridgewood, in the county of Bergen and ,State of New Jersey, have lnvented certain rnew and useful Improvements in Extracting-Tools, of which the following is a specification.

This invention relates to extracting tools,

and aimsvto provide certain improvements.

` through the entire length of the valve insides. It sometimes happens that the parts are screwed into the casing so tightly that the seat member becomes jammed in place with such force that whenvits screw-threaded plug is unscrewed, the flange on the plug which forms a part of the swiveled connection gives away, leaving the .seat member 1n place. The presenty invention provides a tool which is adapted to be inserted in the valve shell for grasping the seat member and exerting suflicient. tension thereon to remove it. Y

In the accompanying drawings, wherein several modifications of the invention are illustrated,-' h Y Figure 1 is a sectional viewof one form of toolas applied to a valve, showing part oi the tool in elevation.

Fig. 2 is a similar View, the toolbeing shown in section and in thefact of withdrawing the valve insides. y I

Fig. 3 is a section on the line 3-3 in Fig. 2.

Fig. 4 is an underside view of the tool.

Fig. 5 is an elevation of a part of the tool.

Fig. 6 is a sectional view of another form of tool.

Fig. 7 is a sectional View of still another i form.

Fi 8 is a cross section on the line 8 8, Fig. Y

Referring first to F igs. 1y to 5, let A ine dicate a valve casing of standard construction which is formed with a boreto receive the working parts or insidesB.. Such working parts or insides usually comprise seat member C carrying a packing D which isV pressed against a tapered shoulder E on the inside of the 'valvecasing The valve proper F is arranged below the seat member and is normally pressed upward by a spring Greacting against a spring holder H. Above the seat member Cl is commonly employed a screw-threaded plug (Whichis not shown),

the. function of which is to press the seat member downwardly' against the shoulder E. This plug is usually swiveledA to the seat member, a part of the swivel connection comprising a flange I formed on the seat member. '.Ihe parts are usually held .together bya pin J which extends through all ofthe parts. When for any reason the seat member is Vforced downwardly so tightly' that it binds against the shell to the extent that unscrewing the plug cannot remove it,`itisy found that the'corresponding flange on the screwthreaded plug is nearly always the part which gives away in the act of unscrewing it. This leaves the seat member in place with all or'part of the flange I intact. 'The tool provided by the present invention is indicated as a whole 'by the reference letter K. It comprises two or more hook sections L L which are' best formed integrally with a body portion M,

vthe hook 'sections normally springing apart sufficiently to bring them into the position' shown inV Fig. 1. In this position they are adapted to'slip down throughthe top of the valve casing, their'hooks Il2 being suiciently separated to pass over the flange I. Each of the hook sections has a bevel Vor cam face 0, which cam faces are adapted to beA engaged by a sliding sleeve P to4 press the sections together to engage the flange I, as shown in Fig. 2. The body portion'M is preferably screw-threadedas shown at Q and working on the screw-thread is a nut R, the function of which is to pull the hook sections upwardly after theyare engaged with the lange I.

'It is very desirable in the operationv ofk the tool that after the hook sections are engaged they shall be drawn upwardly in a direction which is along the axis ofl they valve casing. If they are permitted to tilty to one side or the other the valve parts may be bent so as to render them very diticult to remove, or so much strain may be placed upon the flange I that it will break' oli. F or the purpose of keeping the parts in the center, the sleeve l) is formed with a bearing face P which is adapted to contact with the upper edge A of the valve casing, so that as the sleeve l) is Aforced down after the hook sections are inserted, the bearing iaces meetand the tool is held in axial4 alinement with the valve casing.

` The nut R, is then screwed down idly until it reaches theupper end P2 of the sleeve P whereupon it reacts against the sleeve and a further movement of the nut pulls the hook sections outwardly in directl line until the valve parts are suliiciently loosened to enable them to be withdrawn by merely pulling the entire tool away `from the valve. To assist in the operation of the sleevehandles P3 may be provided. It is preferable that theV sleeve should not have sleeve VPG is more-elongated than in the former figures. A similar nut R2 1s provided for pulling up the hook sections after the sleeve is in contact with the top of the valve.- l

In Figs. 7 and 8 is shown a slightly different construction. In this form the hook sections L4 L5 are formed with Va screwthreaded shank or body portionQ, upon which screws a nut R3. struction the sleeve P7 is swiveled to the nut R3 by means of the groove S and pin T., Thus the sleeve has no preliminary sliding movement independently of the nut, but on the contrary moves downwardly as the nut is turned. The tool being in the position illustrated -in Fig.` 7, the nut is rotated until the bearing face PS strikes the top of the valve, thus causing the sleeve to act upon the cam'i'aces O4 O5 unt-il 'the hoolsections grasp flange I and av continuance of this movement pulls out the insides. The tool is provided with a handle U which may be grasped by the user during the op- But in this coneration, so as to prevent rotation of the tool as the nut is screwed downward.

y Vhile l have ,shown and describedv several forms or the invention it will be understood I do not wish to be limited thereto, since various changes may be made therein without departing from the invention. lt will also be understood that the tool provided by the invention is applicable to other purposes than those described.

What l claim is f l. In an extracting tool, theV combination of a normally expanded resilientmember adapted to engage the part to be extracted, means for moving such member `into such engagement, and means for v moving the member to withdraw such part, said lastnamed means reacting against said firstnamed means.

2. In an extracting tool, the combination oi"I a plurality of normally expanded resilient-bool; sections, means for moving the hook sections into engagement with the part to be extracted, vand means for withdrawing the hook sections, said last-named means reacting against said first-named means.

3. In an extracting tool, the combination ofa plurality of hook members, means for moving said normally expandediesilient hook members into engagement with the part tobe extracted, said means being adapted to bear against the object containing the part 'to be extracted so as tov center'the device, and means reacting against said firstnamed means to withdraw the hook sections.

l. In an extracting tool, the combination of a plurality of hook sections, a sleeve for moving said normally expanded resilient hook sections into engagement with thepart tobe vextracted and a `nut. reacting against said sleeve vto withdraw the'hookrsections.

5. Inganextracting tool,fthe combination eta plurality of hook sections, a `screwtlireaded member formed integrally with said hook sections, said hook sectionsbeing normally suiiciently separated to pass over the part to be extractedja sleeve sur rounding said hook sections and adapted to be moved toward the part to be extracted to move the hook sectionsvinto 'engagement therewith, and a nuty screwing on said screw-threaded member and reacting against said sleeve to withdraw the hook sections.

In witness whereof, ,'I have hereunto signed my name'.

HENRY P. KRAFT.

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